Affiliation
American Association of Variable Star Observers (AAVSO)
Mon, 03/05/2018 - 22:05
AAVSO Alert Notice 618 announces an observing campaign on the faint polar variable SDSS J153817.35+512338.0 in support of HST observations. Please see the notice for details and observing instructions.
Many thanks, and Good observing,
Elizabeth Waagen, AAVSO HQ